vaillant eco tec plus 831

Hi folks, When I turn both taps to pressurise the system, I can't hear any water flowing into the boiler. I've removed one side of the permanent loop and water is flowing ok. Engineer is on his way and says most likely it is a stuck one way valve on the loop. He will fit a new loop for £120...

Hi all, I'm a user of a 831 (it's been fitted in 2010) and started having issues with it recently. I'm not qualified in boiler repair but have done a few days' research and this is what happens with mine: Started by throwing an F75 now and again but worked fine after a reset. When they became...

Hello, I had a new Vaillant ECO TEC PLUS 831 installed in April, since October it has broken 4x with a F75 code. FAULT PUMP/WATER SHORTAGE The boiler is still under guarantee another 9 years and the plumber/installers work is also, but i have no written confirmation of that. The problem is, the...